Varnish



HERMAN J. C. BERTLING, FREDRICI'I IV. \VOCKENFUSS, AND \VILLIAM MEYER, OF BALTIMORE, MARYLAND.

VARNISH.

SPECIFICATION forming part of Letters Patent No. 451,705, dated May 5, 1891.

Application filed January 31, 1891. Serial No. 379,781, (No specimens.)

1 all whom may concern:

Be it known that we, HERMAN J C. BERT- LING, FREDRIOH \V. WocKENFUss, and WIL- LIAM MEYER, citizens of the United States, re-

5 siding at Baltimore, in the State of Maryland,

have invented certain new and useful Improvements in varnishes, of which the follow ing is a specification.

This invention relates to an improvement to in varnishes for general purposes, the object being to produce a quickdrying varnish which when dry will be hard and will not be affected by heat, and which will stand exposure to the weather.

lVith these ends in view the invention consists in a varnish containing the ingredients hereinafter named compounded as specified.

The essential ingredients of the varnish and the proportions in which they are combined are as follows: linseed-oil, one gallon; bi-

chromate of p0tassa,one-eighth pound; alum, (powdered,) three-fourths pound; plaster-ofparis, one pound. These ingredients are boiled together for about two hours to produce the varnish.

This varnish can be used with good effect upon all kinds of wood-work and furniture, &c. To adapt itfor-application to iron, such as upon metallic house-roofs, &c., we add to 0 the ingredients above named sulphur and Portland or like cement in the same proportions as the plaster'-0f-parisviz., one pound of each-and by mixing the varnish as thus compounded with suitable coloring-matter an excellent composition is produced for roofpainting, &c., which is not affected by the most severe heat of the sun and will resist the action of the weather for a great length of time.

The different metals can be compounded 40 with the varnish by grinding the metal with the ingredients first above mentioned and boiling, as before, and we thus produce a metallic varnish.

In using lead, zinc, &c., it is not necessary to grind it with the ingredients, but it is sim ply melted and mixed in.

\Ve have found that other oils than linseed can be used; but as they require boiling for a greater length of time linseed-oil is prefer- 5o able.

Having thus described our invention, what We claim as new, and desire to secure by Letters Patent, is

A varnish composition containing the following ingredients, to Wit: linseed-oil, bichromate of potassa, alum, and plaster-0fparis, combined as specified.

In testimony whereof we affix our signatures in the presence of two witnesses.

HERMAN J O. BERTLING. FREDRIOl-l W. WOOKENFUSS. \VILLIAM MEYER.

W itnesscsz' J NO. T. MADDOX, GEORGE A. WE. 

